#ifndef _UAPI_LINUX_FS_H
#define _UAPI_LINUX_FS_H

#include <ktypes.h>

/* Fixed constants first: */
#undef NR_OPEN
#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */

#define BLOCK_SIZE_BITS 10
#define BLOCK_SIZE (1 << BLOCK_SIZE_BITS)

#define SEEK_SET 0 /* seek relative to beginning of file */
#define SEEK_CUR 1 /* seek relative to current file position */
#define SEEK_END 2 /* seek relative to end of file */
#define SEEK_DATA 3 /* seek to the next data */
#define SEEK_HOLE 4 /* seek to the next hole */
#define SEEK_MAX SEEK_HOLE

#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */

struct file_clone_range
{
    __s64 src_fd;
    __u64 src_offset;
    __u64 src_length;
    __u64 dest_offset;
};

struct fstrim_range
{
    __u64 start;
    __u64 len;
    __u64 minlen;
};

/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
#define FILE_DEDUPE_RANGE_SAME 0
#define FILE_DEDUPE_RANGE_DIFFERS 1

/* from struct btrfs_ioctl_file_extent_same_info */
struct file_dedupe_range_info
{
    __s64 dest_fd; /* in - destination file */
    __u64 dest_offset; /* in - start of extent in destination */
    __u64 bytes_deduped; /* out - total # of bytes we were able
				 * to dedupe from this file. */
    /* status of this dedupe operation:
	 * < 0 for error
	 * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
	 * == FILE_DEDUPE_RANGE_DIFFERS if data differs
	 */
    __s32 status; /* out - see above description */
    __u32 reserved; /* must be zero */
};

/* from struct btrfs_ioctl_file_extent_same_args */
struct file_dedupe_range
{
    __u64 src_offset; /* in - start of extent in source */
    __u64 src_length; /* in - length of extent */
    __u16 dest_count; /* in - total elements in info array */
    __u16 reserved1; /* must be zero */
    __u32 reserved2; /* must be zero */
    struct file_dedupe_range_info info[];
};

/* And dynamically-tunable limits and defaults: */
struct files_stat_struct
{
    unsigned long nr_files; /* read only */
    unsigned long nr_free_files; /* read only */
    unsigned long max_files; /* tunable */
};

struct inodes_stat_t
{
    long nr_inodes;
    long nr_unused;
    long dummy[5]; /* padding for sysctl ABI compatibility */
};

#define NR_FILE 8192 /* this can well be larger on a larger system */

/*
 * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
 */
struct fsxattr
{
    __u32 fsx_xflags; /* xflags field value (get/set) */
    __u32 fsx_extsize; /* extsize field value (get/set)*/
    __u32 fsx_nextents; /* nextents field value (get)	*/
    __u32 fsx_projid; /* project identifier (get/set) */
    __u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
    unsigned char fsx_pad[8];
};

/*
 * Flags for the fsx_xflags field
 */
#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this	*/

/* the read-only stuff doesn't really belong here, but any other place is
   probably as bad and I don't want to create yet another include file. */

#define BLKROSET _IO(0x12, 93) /* set device read-only (0 = read-write) */
#define BLKROGET _IO(0x12, 94) /* get read-only status (0 = read_write) */
#define BLKRRPART _IO(0x12, 95) /* re-read partition table */
#define BLKGETSIZE _IO(0x12, 96) /* return device size /512 (long *arg) */
#define BLKFLSBUF _IO(0x12, 97) /* flush buffer cache */
#define BLKRASET _IO(0x12, 98) /* set read ahead for block device */
#define BLKRAGET _IO(0x12, 99) /* get current read ahead setting */
#define BLKFRASET _IO(0x12, 100) /* set filesystem (mm/filemap.c) read-ahead */
#define BLKFRAGET _IO(0x12, 101) /* get filesystem (mm/filemap.c) read-ahead */
#define BLKSECTSET _IO(0x12, 102) /* set max sectors per request (ll_rw_blk.c) */
#define BLKSECTGET _IO(0x12, 103) /* get max sectors per request (ll_rw_blk.c) */
#define BLKSSZGET _IO(0x12, 104) /* get block device sector size */
#if 0
#define BLKPG _IO(0x12, 105) /* See blkpg.h */

/* Some people are morons.  Do not use sizeof! */

#define BLKELVGET _IOR(0x12, 106, size_t) /* elevator get */
#define BLKELVSET _IOW(0x12, 107, size_t) /* elevator set */
/* This was here just to show that the number is taken -
   probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
#endif
/* A jump here: 108-111 have been used for various private purposes. */
#define BLKBSZGET _IOR(0x12, 112, size_t)
#define BLKBSZSET _IOW(0x12, 113, size_t)
#define BLKGETSIZE64 _IOR(0x12, 114, size_t) /* return device size in bytes (u64 *arg) */
#define BLKTRACESETUP _IOWR(0x12, 115, struct blk_user_trace_setup)
#define BLKTRACESTART _IO(0x12, 116)
#define BLKTRACESTOP _IO(0x12, 117)
#define BLKTRACETEARDOWN _IO(0x12, 118)
#define BLKDISCARD _IO(0x12, 119)
#define BLKIOMIN _IO(0x12, 120)
#define BLKIOOPT _IO(0x12, 121)
#define BLKALIGNOFF _IO(0x12, 122)
#define BLKPBSZGET _IO(0x12, 123)
#define BLKDISCARDZEROES _IO(0x12, 124)
#define BLKSECDISCARD _IO(0x12, 125)
#define BLKROTATIONAL _IO(0x12, 126)
#define BLKZEROOUT _IO(0x12, 127)
#define BLKGETDISKSEQ _IOR(0x12, 128, __u64)
/*
 * A jump here: 130-136 are reserved for zoned block devices
 * (see uapi/linux/blkzoned.h)
 */

#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
#define FIBMAP _IO(0x00, 1) /* bmap access */
#define FIGETBSZ _IO(0x00, 2) /* get the block size used for bmap */
#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
#define FITHAW _IOWR('X', 120, int) /* Thaw */
#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
#define FICLONE _IOW(0x94, 9, int)
#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)
#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)

#define FSLABEL_MAX 256 /* Max chars for the interface; each fs may differ */

#define FS_IOC_GETFLAGS _IOR('f', 1, long)
#define FS_IOC_SETFLAGS _IOW('f', 2, long)
#define FS_IOC_GETVERSION _IOR('v', 1, long)
#define FS_IOC_SETVERSION _IOW('v', 2, long)
#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
#define FS_IOC32_GETVERSION _IOR('v', 1, int)
#define FS_IOC32_SETVERSION _IOW('v', 2, int)
#define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr)
#define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr)
#define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX])
#define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX])

/*
 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
 *
 * Note: for historical reasons, these flags were originally used and
 * defined for use by ext2/ext3, and then other file systems started
 * using these flags so they wouldn't need to write their own version
 * of chattr/lsattr (which was shipped as part of e2fsprogs).  You
 * should think twice before trying to use these flags in new
 * contexts, or trying to assign these flags, since they are used both
 * as the UAPI and the on-disk encoding for ext2/3/4.  Also, we are
 * almost out of 32-bit flags.  :-)
 *
 * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from
 * XFS to the generic FS level interface.  This uses a structure that
 * has padding and hence has more room to grow, so it may be more
 * appropriate for many new use cases.
 *
 * Please do not change these flags or interfaces before checking with
 * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org.
 */
#define FS_SECRM_FL 0x00000001 /* Secure deletion */
#define FS_UNRM_FL 0x00000002 /* Undelete */
#define FS_COMPR_FL 0x00000004 /* Compress file */
#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
#define FS_NODUMP_FL 0x00000040 /* do not dump file */
#define FS_NOATIME_FL 0x00000080 /* do not update atime */
/* Reserved for compression usage... */
#define FS_DIRTY_FL 0x00000100
#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
/* End compression flags --- maybe not all used */
#define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */
#define FS_BTREE_FL 0x00001000 /* btree format dir */
#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
#define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */
#define FS_EXTENT_FL 0x00080000 /* Extents */
#define FS_VERITY_FL 0x00100000 /* Verity protected inode */
#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */
#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */
#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
#define FS_DAX_FL 0x02000000 /* Inode is DAX */
#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */
#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
#define FS_CASEFOLD_FL 0x40000000 /* Folder is case insensitive */
#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */

#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */

#define SYNC_FILE_RANGE_WAIT_BEFORE 1
#define SYNC_FILE_RANGE_WRITE 2
#define SYNC_FILE_RANGE_WAIT_AFTER 4
#define SYNC_FILE_RANGE_WRITE_AND_WAIT \
    (SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_BEFORE | SYNC_FILE_RANGE_WAIT_AFTER)

/*
 * Flags for preadv2/pwritev2:
 */

typedef int __bitwise __kernel_rwf_t;

/* high priority request, poll if possible */
#define RWF_HIPRI ((__force __kernel_rwf_t)0x00000001)

/* per-IO O_DSYNC */
#define RWF_DSYNC ((__force __kernel_rwf_t)0x00000002)

/* per-IO O_SYNC */
#define RWF_SYNC ((__force __kernel_rwf_t)0x00000004)

/* per-IO, return -EAGAIN if operation would block */
#define RWF_NOWAIT ((__force __kernel_rwf_t)0x00000008)

/* per-IO O_APPEND */
#define RWF_APPEND ((__force __kernel_rwf_t)0x00000010)

/* mask of flags supported by the kernel */
#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT | RWF_APPEND)

#endif